A large-scale increase in prices on the Russian stock market has boosted the RTS index by more than 4 percent to 448.73 points by 4:30 p.m. today. The RTS-Blue Chips index surged by more than 6 percent. Surgutneftegas was the leader of today's rise on the domestic market, gaining 15.59 percent on the RTS stock exchange. The Moscow energy utility Mosenergo added 8.72 percent, RAO UES was up 6.57 percent and LUKoil rose by more than 3 percent. The RTS trade volume surpassed $38m.